In situ Reconstructured Alloy Nanosheets Heterojunction for Highly Selective Electrochemical CO Reduction to Formate.

Tin (Sn)-based materials are expected to realize efficient CO electroreduction into formate. Herein, we constructed a heterojunction by depositing Cu on Cu-doped SnS nanosheets. During the electrochemical reaction, this heterojunction evolves to a highly active phase of CuO@CuSn while maintaining its two-dimensional morphology.